Ответ:
\[\frac{11}{30}-\frac{17}{36}=\frac{66}{180}-\frac{85}{180}=-\frac{19}{180}.\]
\[-\frac{19}{180}:\frac{19}{45}=-\frac{19}{180}\cdot\frac{45}{19}=-\frac{1}{4}.\]
Ответ: \(-\frac{1}{4}\).
\[\frac{11}{30}-\frac{17}{36}=\frac{66}{180}-\frac{85}{180}=-\frac{19}{180}.\]
\[-\frac{19}{180}:\frac{19}{45}=-\frac{19}{180}\cdot\frac{45}{19}=-\frac{1}{4}.\]
Ответ: \(-\frac{1}{4}\).